TEC1-12703 Peltier Cooler Module 30*30 12V3A

SKU: FA2051
Model Number

TEC1-12703
Dimensions

30mm x 30mm x 3.2mm
Internal Couples

127
Operating Voltage

15.4V DC
Rated Current

3.0A
Max Cooling Power

~28W – 30W
Max Temp Difference

≥65°C
Operating Temperature

-50°C to +80°C
Lead Wire

150mm (Approx.) 20 AWG
Internal Resistance

3.3 ~ 3.9 Ω
Product Description
The TEC1-12703 is a high-performance, compact thermoelectric cooler (TEC) designed for applications where space is limited but precise temperature control is critical. Measuring just 30x30mm, this Peltier device utilizes the thermoelectric effect to create a significant temperature differential between its two ceramic plates.
With a 3-Ampere current rating, the 12703 model offers a more energy-efficient and lower-heat-signature cooling solution compared to the larger 12706 series. It is the ideal choice for cooling small sensors, laser diodes, and high-performance micro-components. Because it is a solid-state device with no moving parts, it operates silently and offers extreme durability, making it perfect for medical, laboratory, and aerospace environments where vibration and noise must be eliminated.
Key Features
  • Space-Saving Footprint: The 30x30mm size allows for integration into miniaturized enclosures and tight PCB layouts.
  • High Precision: Enables sub-degree temperature stability when used with a PID controller or PWM power supply.
  • Solid-State Longevity: No moving parts, no refrigerants, and no mechanical wear, ensuring a maintenance-free lifespan.
  • Instant Reversibility: Simply reverse the DC polarity to switch the module from a cooler to a high-precision heater.
  • Eco-Friendly: Fully RoHS compliant; operates without CFCs or other harmful greenhouse gases.
  • Bismuth Telluride Technology: Constructed with high-purity semiconductor couples for maximum thermal pumping efficiency.
Usage & Applications
  • Optoelectronics: Stabilizing the temperature of laser diodes, infrared sensors, and CCD cameras for clear imaging.
  • Laboratory Hardware: Cooling small chemical samples or reagents in micro-centrifuges and diagnostic kits.
  • Portable Medical Storage: Ensuring precise temperature control for insulin, vaccines, or sensitive biological samples.
  • Telecom Equipment: Thermal management for high-speed fiber optic transceivers and amplifiers.
  • Compact Consumer Tech: Mini beverage chillers, cosmetic refrigerators, and overclocking small embedded processors
Q: Can I test this module without a heatsink?

No. You must have a heatsink and fan attached to the hot side before applying power. Without heat dissipation, the module will reach its thermal limit and burn out in less than 2 seconds.

Q: Which side of the 30x30mm module is the cold side?
Typically, the side with the model number (TEC1-12703) printed on it is the cold side. If there is no print, the cold side is the one that faces up when the red wire is on the right and the black wire is on the left.
Q: Why choose the 12703 over the 12706?

The 12703 is smaller (30mm vs 40mm) and draws less current (3A vs 6A). It is better for smaller heat loads where you want to minimize the total heat being exhausted from the hot side into your system

Q: Do I need to use thermal grease?

Yes. A thin, uniform layer of high-quality thermal paste must be applied between both sides of the ceramic plates and your heatsinks to ensure efficient heat transfer.

Q: Can I run this directly from a 12V 5A power supply?

Yes. The module will only draw the current it needs (max 3A) based on the voltage provided. A 12V DC power supply is the standard and most efficient way to power this device

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